drivers/media/video/em28xx/em28xx-dvb.c

   1 /*
   2  DVB device driver for em28xx
   3
   4  (c) 2008 Mauro Carvalho Chehab <mchehab@infradead.org>
   5
   6  (c) 2008 Devin Heitmueller <devin.heitmueller@gmail.com>
   7         - Fixes for the driver to properly work with HVR-950
   8         - Fixes for the driver to properly work with Pinnacle PCTV HD Pro Stick
   9         - Fixes for the driver to properly work with AMD ATI TV Wonder HD 600
  10
  11  (c) 2008 Aidan Thornton <makosoft@googlemail.com>
  12
  13  Based on cx88-dvb, saa7134-dvb and videobuf-dvb originally written by:
  14         (c) 2004, 2005 Chris Pascoe <c.pascoe@itee.uq.edu.au>
  15         (c) 2004 Gerd Knorr <kraxel@bytesex.org> [SuSE Labs]
  16
  17  This program is free software; you can redistribute it and/or modify
  18  it under the terms of the GNU General Public License as published by
  19  the Free Software Foundation; either version 2 of the License.
  20  */
  21
  22 #include <linux/kernel.h>
  23 #include <linux/slab.h>
  24 #include <linux/usb.h>
  25
  26 #include "em28xx.h"
  27 #include <media/v4l2-common.h>
  28 #include <media/videobuf-vmalloc.h>
  29 #include <media/tuner.h>
  30 #include "tuner-simple.h"
  31
  32 #include "lgdt330x.h"
  33 #include "lgdt3305.h"
  34 #include "zl10353.h"
  35 #include "s5h1409.h"
  36 #include "mt352.h"
  37 #include "mt352_priv.h" /* FIXME */
  38 #include "tda1002x.h"
  39 #include "tda18271.h"
  40
  41 MODULE_DESCRIPTION("driver for em28xx based DVB cards");
  42 MODULE_AUTHOR("Mauro Carvalho Chehab <mchehab@infradead.org>");
  43 MODULE_LICENSE("GPL");
  44
  45 static unsigned int debug;
  46 module_param(debug, int, 0644);
  47 MODULE_PARM_DESC(debug, "enable debug messages [dvb]");
  48
  49 DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
  50
  51 #define dprintk(level, fmt, arg...) do {                        \
  52 if (debug >= level)                                             \
  53         printk(KERN_DEBUG "%s/2-dvb: " fmt, dev->name, ## arg); \
  54 } while (0)
  55
  56 #define EM28XX_DVB_NUM_BUFS 5
  57 #define EM28XX_DVB_MAX_PACKETS 64
  58
  59 struct em28xx_dvb {
  60         struct dvb_frontend        *frontend;
  61
  62         /* feed count management */
  63         struct mutex               lock;
  64         int                        nfeeds;
  65
  66         /* general boilerplate stuff */
  67         struct dvb_adapter         adapter;
  68         struct dvb_demux           demux;
  69         struct dmxdev              dmxdev;
  70         struct dmx_frontend        fe_hw;
  71         struct dmx_frontend        fe_mem;
  72         struct dvb_net             net;
  73 };
  74
  75
  76 static inline void print_err_status(struct em28xx *dev,
  77                                      int packet, int status)
  78 {
  79         char *errmsg = "Unknown";
  80
  81         switch (status) {
  82         case -ENOENT:
  83                 errmsg = "unlinked synchronuously";
  84                 break;
  85         case -ECONNRESET:
  86                 errmsg = "unlinked asynchronuously";
  87                 break;
  88         case -ENOSR:
  89                 errmsg = "Buffer error (overrun)";
  90                 break;
  91         case -EPIPE:
  92                 errmsg = "Stalled (device not responding)";
  93                 break;
  94         case -EOVERFLOW:
  95                 errmsg = "Babble (bad cable?)";
  96                 break;
  97         case -EPROTO:
  98                 errmsg = "Bit-stuff error (bad cable?)";
  99                 break;
 100         case -EILSEQ:
 101                 errmsg = "CRC/Timeout (could be anything)";
 102                 break;
 103         case -ETIME:
 104                 errmsg = "Device does not respond";
 105                 break;
 106         }
 107         if (packet < 0) {
 108                 dprintk(1, "URB status %d [%s].\n", status, errmsg);
 109         } else {
 110                 dprintk(1, "URB packet %d, status %d [%s].\n",
 111                         packet, status, errmsg);
 112         }
 113 }
 114
 115 static inline int dvb_isoc_copy(struct em28xx *dev, struct urb *urb)
 116 {
 117         int i;
 118
 119         if (!dev)
 120                 return 0;
 121
 122         if ((dev->state & DEV_DISCONNECTED) || (dev->state & DEV_MISCONFIGURED))
 123                 return 0;
 124
 125         if (urb->status < 0) {
 126                 print_err_status(dev, -1, urb->status);
 127                 if (urb->status == -ENOENT)
 128                         return 0;
 129         }
 130
 131         for (i = 0; i < urb->number_of_packets; i++) {
 132                 int status = urb->iso_frame_desc[i].status;
 133
 134                 if (status < 0) {
 135                         print_err_status(dev, i, status);
 136                         if (urb->iso_frame_desc[i].status != -EPROTO)
 137                                 continue;
 138                 }
 139
 140                 dvb_dmx_swfilter(&dev->dvb->demux, urb->transfer_buffer +
 141                                  urb->iso_frame_desc[i].offset,
 142                                  urb->iso_frame_desc[i].actual_length);
 143         }
 144
 145         return 0;
 146 }
 147
 148 static int start_streaming(struct em28xx_dvb *dvb)
 149 {
 150         int rc;
 151         struct em28xx *dev = dvb->adapter.priv;
 152         int max_dvb_packet_size;
 153
 154         usb_set_interface(dev->udev, 0, 1);
 155         rc = em28xx_set_mode(dev, EM28XX_DIGITAL_MODE);
 156         if (rc < 0)
 157                 return rc;
 158
 159         max_dvb_packet_size = em28xx_isoc_dvb_max_packetsize(dev);
 160
 161         return em28xx_init_isoc(dev, EM28XX_DVB_MAX_PACKETS,
 162                                 EM28XX_DVB_NUM_BUFS, max_dvb_packet_size,
 163                                 dvb_isoc_copy);
 164 }
 165
 166 static int stop_streaming(struct em28xx_dvb *dvb)
 167 {
 168         struct em28xx *dev = dvb->adapter.priv;
 169
 170         em28xx_uninit_isoc(dev);
 171
 172         em28xx_set_mode(dev, EM28XX_SUSPEND);
 173
 174         return 0;
 175 }
 176
 177 static int start_feed(struct dvb_demux_feed *feed)
 178 {
 179         struct dvb_demux *demux  = feed->demux;
 180         struct em28xx_dvb *dvb = demux->priv;
 181         int rc, ret;
 182
 183         if (!demux->dmx.frontend)
 184                 return -EINVAL;
 185
 186         mutex_lock(&dvb->lock);
 187         dvb->nfeeds++;
 188         rc = dvb->nfeeds;
 189
 190         if (dvb->nfeeds == 1) {
 191                 ret = start_streaming(dvb);
 192                 if (ret < 0)
 193                         rc = ret;
 194         }
 195
 196         mutex_unlock(&dvb->lock);
 197         return rc;
 198 }
 199
 200 static int stop_feed(struct dvb_demux_feed *feed)
 201 {
 202         struct dvb_demux *demux  = feed->demux;
 203         struct em28xx_dvb *dvb = demux->priv;
 204         int err = 0;
 205
 206         mutex_lock(&dvb->lock);
 207         dvb->nfeeds--;
 208
 209         if (0 == dvb->nfeeds)
 210                 err = stop_streaming(dvb);
 211
 212         mutex_unlock(&dvb->lock);
 213         return err;
 214 }
 215
 216
 217
 218 /* ------------------------------------------------------------------ */
 219 static int em28xx_dvb_bus_ctrl(struct dvb_frontend *fe, int acquire)
 220 {
 221         struct em28xx *dev = fe->dvb->priv;
 222
 223         if (acquire)
 224                 return em28xx_set_mode(dev, EM28XX_DIGITAL_MODE);
 225         else
 226                 return em28xx_set_mode(dev, EM28XX_SUSPEND);
 227 }
 228
 229 /* ------------------------------------------------------------------ */
 230
 231 static struct lgdt330x_config em2880_lgdt3303_dev = {
 232         .demod_address = 0x0e,
 233         .demod_chip = LGDT3303,
 234 };
 235
 236 static struct lgdt3305_config em2870_lgdt3304_dev = {
 237         .i2c_addr           = 0x0e,
 238         .demod_chip         = LGDT3304,
 239         .spectral_inversion = 1,
 240         .deny_i2c_rptr      = 1,
 241         .mpeg_mode          = LGDT3305_MPEG_PARALLEL,
 242         .tpclk_edge         = LGDT3305_TPCLK_FALLING_EDGE,
 243         .tpvalid_polarity   = LGDT3305_TP_VALID_HIGH,
 244         .vsb_if_khz         = 3250,
 245         .qam_if_khz         = 4000,
 246 };
 247
 248 static struct zl10353_config em28xx_zl10353_with_xc3028 = {
 249         .demod_address = (0x1e >> 1),
 250         .no_tuner = 1,
 251         .parallel_ts = 1,
 252         .if2 = 45600,
 253 };
 254
 255 static struct s5h1409_config em28xx_s5h1409_with_xc3028 = {
 256         .demod_address = 0x32 >> 1,
 257         .output_mode   = S5H1409_PARALLEL_OUTPUT,
 258         .gpio          = S5H1409_GPIO_OFF,
 259         .inversion     = S5H1409_INVERSION_OFF,
 260         .status_mode   = S5H1409_DEMODLOCKING,
 261         .mpeg_timing   = S5H1409_MPEGTIMING_CONTINOUS_NONINVERTING_CLOCK
 262 };
 263
 264 static struct tda18271_std_map kworld_a340_std_map = {
 265         .atsc_6   = { .if_freq = 3250, .agc_mode = 3, .std = 0,
 266                       .if_lvl = 1, .rfagc_top = 0x37, },
 267         .qam_6    = { .if_freq = 4000, .agc_mode = 3, .std = 1,
 268                       .if_lvl = 1, .rfagc_top = 0x37, },
 269 };
 270
 271 static struct tda18271_config kworld_a340_config = {
 272         .std_map           = &kworld_a340_std_map,
 273 };
 274
 275 static struct zl10353_config em28xx_zl10353_xc3028_no_i2c_gate = {
 276         .demod_address = (0x1e >> 1),
 277         .no_tuner = 1,
 278         .disable_i2c_gate_ctrl = 1,
 279         .parallel_ts = 1,
 280         .if2 = 45600,
 281 };
 282
 283 #ifdef EM28XX_DRX397XD_SUPPORT
 284 /* [TODO] djh - not sure yet what the device config needs to contain */
 285 static struct drx397xD_config em28xx_drx397xD_with_xc3028 = {
 286         .demod_address = (0xe0 >> 1),
 287 };
 288 #endif
 289
 290 static int mt352_terratec_xs_init(struct dvb_frontend *fe)
 291 {
 292         /* Values extracted from a USB trace of the Terratec Windows driver */
 293         static u8 clock_config[]   = { CLOCK_CTL,  0x38, 0x2c };
 294         static u8 reset[]          = { RESET,      0x80 };
 295         static u8 adc_ctl_1_cfg[]  = { ADC_CTL_1,  0x40 };
 296         static u8 agc_cfg[]        = { AGC_TARGET, 0x28, 0xa0 };
 297         static u8 input_freq_cfg[] = { INPUT_FREQ_1, 0x31, 0xb8 };
 298         static u8 rs_err_cfg[]     = { RS_ERR_PER_1, 0x00, 0x4d };
 299         static u8 capt_range_cfg[] = { CAPT_RANGE, 0x32 };
 300         static u8 trl_nom_cfg[]    = { TRL_NOMINAL_RATE_1, 0x64, 0x00 };
 301         static u8 tps_given_cfg[]  = { TPS_GIVEN_1, 0x40, 0x80, 0x50 };
 302         static u8 tuner_go[]       = { TUNER_GO, 0x01};
 303
 304         mt352_write(fe, clock_config,   sizeof(clock_config));
 305         udelay(200);
 306         mt352_write(fe, reset,          sizeof(reset));
 307         mt352_write(fe, adc_ctl_1_cfg,  sizeof(adc_ctl_1_cfg));
 308         mt352_write(fe, agc_cfg,        sizeof(agc_cfg));
 309         mt352_write(fe, input_freq_cfg, sizeof(input_freq_cfg));
 310         mt352_write(fe, rs_err_cfg,     sizeof(rs_err_cfg));
 311         mt352_write(fe, capt_range_cfg, sizeof(capt_range_cfg));
 312         mt352_write(fe, trl_nom_cfg,    sizeof(trl_nom_cfg));
 313         mt352_write(fe, tps_given_cfg,  sizeof(tps_given_cfg));
 314         mt352_write(fe, tuner_go,       sizeof(tuner_go));
 315         return 0;
 316 }
 317
 318 static struct mt352_config terratec_xs_mt352_cfg = {
 319         .demod_address = (0x1e >> 1),
 320         .no_tuner = 1,
 321         .if2 = 45600,
 322         .demod_init = mt352_terratec_xs_init,
 323 };
 324
 325 static struct tda10023_config em28xx_tda10023_config = {
 326         .demod_address = 0x0c,
 327         .invert = 1,
 328 };
 329
 330 /* ------------------------------------------------------------------ */
 331
 332 static int attach_xc3028(u8 addr, struct em28xx *dev)
 333 {
 334         struct dvb_frontend *fe;
 335         struct xc2028_config cfg;
 336
 337         memset(&cfg, 0, sizeof(cfg));
 338         cfg.i2c_adap  = &dev->i2c_adap;
 339         cfg.i2c_addr  = addr;
 340
 341         if (!dev->dvb->frontend) {
 342                 em28xx_errdev("/2: dvb frontend not attached. "
 343                                 "Can't attach xc3028\n");
 344                 return -EINVAL;
 345         }
 346
 347         fe = dvb_attach(xc2028_attach, dev->dvb->frontend, &cfg);
 348         if (!fe) {
 349                 em28xx_errdev("/2: xc3028 attach failed\n");
 350                 dvb_frontend_detach(dev->dvb->frontend);
 351                 dev->dvb->frontend = NULL;
 352                 return -EINVAL;
 353         }
 354
 355         em28xx_info("%s/2: xc3028 attached\n", dev->name);
 356
 357         return 0;
 358 }
 359
 360 /* ------------------------------------------------------------------ */
 361
 362 static int register_dvb(struct em28xx_dvb *dvb,
 363                  struct module *module,
 364                  struct em28xx *dev,
 365                  struct device *device)
 366 {
 367         int result;
 368
 369         mutex_init(&dvb->lock);
 370
 371         /* register adapter */
 372         result = dvb_register_adapter(&dvb->adapter, dev->name, module, device,
 373                                       adapter_nr);
 374         if (result < 0) {
 375                 printk(KERN_WARNING "%s: dvb_register_adapter failed (errno = %d)\n",
 376                        dev->name, result);
 377                 goto fail_adapter;
 378         }
 379
 380         /* Ensure all frontends negotiate bus access */
 381         dvb->frontend->ops.ts_bus_ctrl = em28xx_dvb_bus_ctrl;
 382
 383         dvb->adapter.priv = dev;
 384
 385         /* register frontend */
 386         result = dvb_register_frontend(&dvb->adapter, dvb->frontend);
 387         if (result < 0) {
 388                 printk(KERN_WARNING "%s: dvb_register_frontend failed (errno = %d)\n",
 389                        dev->name, result);
 390                 goto fail_frontend;
 391         }
 392
 393         /* register demux stuff */
 394         dvb->demux.dmx.capabilities =
 395                 DMX_TS_FILTERING | DMX_SECTION_FILTERING |
 396                 DMX_MEMORY_BASED_FILTERING;
 397         dvb->demux.priv       = dvb;
 398         dvb->demux.filternum  = 256;
 399         dvb->demux.feednum    = 256;
 400         dvb->demux.start_feed = start_feed;
 401         dvb->demux.stop_feed  = stop_feed;
 402
 403         result = dvb_dmx_init(&dvb->demux);
 404         if (result < 0) {
 405                 printk(KERN_WARNING "%s: dvb_dmx_init failed (errno = %d)\n",
 406                        dev->name, result);
 407                 goto fail_dmx;
 408         }
 409
 410         dvb->dmxdev.filternum    = 256;
 411         dvb->dmxdev.demux        = &dvb->demux.dmx;
 412         dvb->dmxdev.capabilities = 0;
 413         result = dvb_dmxdev_init(&dvb->dmxdev, &dvb->adapter);
 414         if (result < 0) {
 415                 printk(KERN_WARNING "%s: dvb_dmxdev_init failed (errno = %d)\n",
 416                        dev->name, result);
 417                 goto fail_dmxdev;
 418         }
 419
 420         dvb->fe_hw.source = DMX_FRONTEND_0;
 421         result = dvb->demux.dmx.add_frontend(&dvb->demux.dmx, &dvb->fe_hw);
 422         if (result < 0) {
 423                 printk(KERN_WARNING "%s: add_frontend failed (DMX_FRONTEND_0, errno = %d)\n",
 424                        dev->name, result);
 425                 goto fail_fe_hw;
 426         }
 427
 428         dvb->fe_mem.source = DMX_MEMORY_FE;
 429         result = dvb->demux.dmx.add_frontend(&dvb->demux.dmx, &dvb->fe_mem);
 430         if (result < 0) {
 431                 printk(KERN_WARNING "%s: add_frontend failed (DMX_MEMORY_FE, errno = %d)\n",
 432                        dev->name, result);
 433                 goto fail_fe_mem;
 434         }
 435
 436         result = dvb->demux.dmx.connect_frontend(&dvb->demux.dmx, &dvb->fe_hw);
 437         if (result < 0) {
 438                 printk(KERN_WARNING "%s: connect_frontend failed (errno = %d)\n",
 439                        dev->name, result);
 440                 goto fail_fe_conn;
 441         }
 442
 443         /* register network adapter */
 444         dvb_net_init(&dvb->adapter, &dvb->net, &dvb->demux.dmx);
 445         return 0;
 446
 447 fail_fe_conn:
 448         dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_mem);
 449 fail_fe_mem:
 450         dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_hw);
 451 fail_fe_hw:
 452         dvb_dmxdev_release(&dvb->dmxdev);
 453 fail_dmxdev:
 454         dvb_dmx_release(&dvb->demux);
 455 fail_dmx:
 456         dvb_unregister_frontend(dvb->frontend);
 457 fail_frontend:
 458         dvb_frontend_detach(dvb->frontend);
 459         dvb_unregister_adapter(&dvb->adapter);
 460 fail_adapter:
 461         return result;
 462 }
 463
 464 static void unregister_dvb(struct em28xx_dvb *dvb)
 465 {
 466         dvb_net_release(&dvb->net);
 467         dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_mem);
 468         dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_hw);
 469         dvb_dmxdev_release(&dvb->dmxdev);
 470         dvb_dmx_release(&dvb->demux);
 471         dvb_unregister_frontend(dvb->frontend);
 472         dvb_frontend_detach(dvb->frontend);
 473         dvb_unregister_adapter(&dvb->adapter);
 474 }
 475
 476
 477 static int dvb_init(struct em28xx *dev)
 478 {
 479         int result = 0;
 480         struct em28xx_dvb *dvb;
 481
 482         if (!dev->board.has_dvb) {
 483                 /* This device does not support the extension */
 484                 return 0;
 485         }
 486
 487         dvb = kzalloc(sizeof(struct em28xx_dvb), GFP_KERNEL);
 488
 489         if (dvb == NULL) {
 490                 em28xx_info("em28xx_dvb: memory allocation failed\n");
 491                 return -ENOMEM;
 492         }
 493         dev->dvb = dvb;
 494
 495         mutex_lock(&dev->lock);
 496         em28xx_set_mode(dev, EM28XX_DIGITAL_MODE);
 497         /* init frontend */
 498         switch (dev->model) {
 499         case EM2883_BOARD_HAUPPAUGE_WINTV_HVR_850:
 500         case EM2883_BOARD_HAUPPAUGE_WINTV_HVR_950:
 501         case EM2880_BOARD_PINNACLE_PCTV_HD_PRO:
 502         case EM2880_BOARD_AMD_ATI_TV_WONDER_HD_600:
 503                 dvb->frontend = dvb_attach(lgdt330x_attach,
 504                                            &em2880_lgdt3303_dev,
 505                                            &dev->i2c_adap);
 506                 if (attach_xc3028(0x61, dev) < 0) {
 507                         result = -EINVAL;
 508                         goto out_free;
 509                 }
 510                 break;
 511         case EM2880_BOARD_KWORLD_DVB_310U:
 512                 dvb->frontend = dvb_attach(zl10353_attach,
 513                                            &em28xx_zl10353_with_xc3028,
 514                                            &dev->i2c_adap);
 515                 if (attach_xc3028(0x61, dev) < 0) {
 516                         result = -EINVAL;
 517                         goto out_free;
 518                 }
 519                 break;
 520         case EM2880_BOARD_HAUPPAUGE_WINTV_HVR_900:
 521         case EM2882_BOARD_TERRATEC_HYBRID_XS:
 522         case EM2880_BOARD_EMPIRE_DUAL_TV:
 523                 dvb->frontend = dvb_attach(zl10353_attach,
 524                                            &em28xx_zl10353_xc3028_no_i2c_gate,
 525                                            &dev->i2c_adap);
 526                 if (attach_xc3028(0x61, dev) < 0) {
 527                         result = -EINVAL;
 528                         goto out_free;
 529                 }
 530                 break;
 531         case EM2880_BOARD_TERRATEC_HYBRID_XS:
 532         case EM2880_BOARD_TERRATEC_HYBRID_XS_FR:
 533         case EM2881_BOARD_PINNACLE_HYBRID_PRO:
 534         case EM2882_BOARD_DIKOM_DK300:
 535         case EM2882_BOARD_KWORLD_VS_DVBT:
 536                 dvb->frontend = dvb_attach(zl10353_attach,
 537                                            &em28xx_zl10353_xc3028_no_i2c_gate,
 538                                            &dev->i2c_adap);
 539                 if (dvb->frontend == NULL) {
 540                         /* This board could have either a zl10353 or a mt352.
 541                            If the chip id isn't for zl10353, try mt352 */
 542                         dvb->frontend = dvb_attach(mt352_attach,
 543                                                    &terratec_xs_mt352_cfg,
 544                                                    &dev->i2c_adap);
 545                 }
 546
 547                 if (attach_xc3028(0x61, dev) < 0) {
 548                         result = -EINVAL;
 549                         goto out_free;
 550                 }
 551                 break;
 552         case EM2883_BOARD_KWORLD_HYBRID_330U:
 553         case EM2882_BOARD_EVGA_INDTUBE:
 554                 dvb->frontend = dvb_attach(s5h1409_attach,
 555                                            &em28xx_s5h1409_with_xc3028,
 556                                            &dev->i2c_adap);
 557                 if (attach_xc3028(0x61, dev) < 0) {
 558                         result = -EINVAL;
 559                         goto out_free;
 560                 }
 561                 break;
 562         case EM2882_BOARD_KWORLD_ATSC_315U:
 563                 dvb->frontend = dvb_attach(lgdt330x_attach,
 564                                            &em2880_lgdt3303_dev,
 565                                            &dev->i2c_adap);
 566                 if (dvb->frontend != NULL) {
 567                         if (!dvb_attach(simple_tuner_attach, dvb->frontend,
 568                                 &dev->i2c_adap, 0x61, TUNER_THOMSON_DTT761X)) {
 569                                 result = -EINVAL;
 570                                 goto out_free;
 571                         }
 572                 }
 573                 break;
 574         case EM2880_BOARD_HAUPPAUGE_WINTV_HVR_900_R2:
 575 #ifdef EM28XX_DRX397XD_SUPPORT
 576                 /* We don't have the config structure properly populated, so
 577                    this is commented out for now */
 578                 dvb->frontend = dvb_attach(drx397xD_attach,
 579                                            &em28xx_drx397xD_with_xc3028,
 580                                            &dev->i2c_adap);
 581                 if (attach_xc3028(0x61, dev) < 0) {
 582                         result = -EINVAL;
 583                         goto out_free;
 584                 }
 585                 break;
 586 #endif
 587         case EM2870_BOARD_REDDO_DVB_C_USB_BOX:
 588                 /* Philips CU1216L NIM (Philips TDA10023 + Infineon TUA6034) */
 589                 dvb->frontend = dvb_attach(tda10023_attach,
 590                         &em28xx_tda10023_config,
 591                         &dev->i2c_adap, 0x48);
 592                 if (dvb->frontend) {
 593                         if (!dvb_attach(simple_tuner_attach, dvb->frontend,
 594                                 &dev->i2c_adap, 0x60, TUNER_PHILIPS_CU1216L)) {
 595                                 result = -EINVAL;
 596                                 goto out_free;
 597                         }
 598                 }
 599                 break;
 600         case EM2870_BOARD_KWORLD_A340:
 601                 dvb->frontend = dvb_attach(lgdt3305_attach,
 602                                            &em2870_lgdt3304_dev,
 603                                            &dev->i2c_adap);
 604                 if (dvb->frontend != NULL)
 605                         dvb_attach(tda18271_attach, dvb->frontend, 0x60,
 606                                    &dev->i2c_adap, &kworld_a340_config);
 607                 break;
 608         default:
 609                 em28xx_errdev("/2: The frontend of your DVB/ATSC card"
 610                                 " isn't supported yet\n");
 611                 break;
 612         }
 613         if (NULL == dvb->frontend) {
 614                 em28xx_errdev("/2: frontend initialization failed\n");
 615                 result = -EINVAL;
 616                 goto out_free;
 617         }
 618         /* define general-purpose callback pointer */
 619         dvb->frontend->callback = em28xx_tuner_callback;
 620
 621         /* register everything */
 622         result = register_dvb(dvb, THIS_MODULE, dev, &dev->udev->dev);
 623
 624         if (result < 0)
 625                 goto out_free;
 626
 627         em28xx_info("Successfully loaded em28xx-dvb\n");
 628 ret:
 629         em28xx_set_mode(dev, EM28XX_SUSPEND);
 630         mutex_unlock(&dev->lock);
 631         return result;
 632
 633 out_free:
 634         kfree(dvb);
 635         dev->dvb = NULL;
 636         goto ret;
 637 }
 638
 639 static int dvb_fini(struct em28xx *dev)
 640 {
 641         if (!dev->board.has_dvb) {
 642                 /* This device does not support the extension */
 643                 return 0;
 644         }
 645
 646         if (dev->dvb) {
 647                 unregister_dvb(dev->dvb);
 648                 kfree(dev->dvb);
 649                 dev->dvb = NULL;
 650         }
 651
 652         return 0;
 653 }
 654
 655 static struct em28xx_ops dvb_ops = {
 656         .id   = EM28XX_DVB,
 657         .name = "Em28xx dvb Extension",
 658         .init = dvb_init,
 659         .fini = dvb_fini,
 660 };
 661
 662 static int __init em28xx_dvb_register(void)
 663 {
 664         return em28xx_register_extension(&dvb_ops);
 665 }
 666
 667 static void __exit em28xx_dvb_unregister(void)
 668 {
 669         em28xx_unregister_extension(&dvb_ops);
 670 }
 671
 672 module_init(em28xx_dvb_register);
 673 module_exit(em28xx_dvb_unregister);